Koshelev AE, Aranson IS
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Phys Rev Lett. 2000 Oct 30;85(18):3938-41. doi: 10.1103/PhysRevLett.85.3938.
We investigate the dynamics of the Josephson vortex lattice in layered high- T(c) superconductors at high magnetic fields. It is shown that the average electric current depends on the lattice structure and is resonantly enhanced when the Josephson frequency matches the frequency of the plasma mode. We find the stability regions of a moving lattice. It is shown that a specific lattice structure at a given velocity is uniquely selected by the boundary conditions; at small velocities a periodic triangular lattice is stable and looses its stability at some critical velocity. At even higher velocities, a structure close to a rectangular lattice is restored.
我们研究了层状高温超导体在高磁场下约瑟夫森涡旋晶格的动力学。结果表明，平均电流取决于晶格结构，并且当约瑟夫森频率与等离子体模频率匹配时会共振增强。我们找到了移动晶格的稳定区域。结果表明，给定速度下的特定晶格结构由边界条件唯一选择；在小速度下，周期性三角形晶格是稳定的，并在某个临界速度下失去稳定性。在更高的速度下，会恢复接近矩形晶格的结构。
